Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
16f7e0fe | 18 | |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
1da177e4 | 21 | #include "xfs_types.h" |
a844f451 | 22 | #include "xfs_bit.h" |
1da177e4 | 23 | #include "xfs_log.h" |
a844f451 | 24 | #include "xfs_inum.h" |
1da177e4 LT |
25 | #include "xfs_trans.h" |
26 | #include "xfs_sb.h" | |
27 | #include "xfs_ag.h" | |
1da177e4 | 28 | #include "xfs_dir2.h" |
1da177e4 | 29 | #include "xfs_mount.h" |
a844f451 | 30 | #include "xfs_da_btree.h" |
1da177e4 LT |
31 | #include "xfs_bmap_btree.h" |
32 | #include "xfs_ialloc_btree.h" | |
1da177e4 | 33 | #include "xfs_dinode.h" |
1da177e4 | 34 | #include "xfs_inode.h" |
a844f451 | 35 | #include "xfs_inode_item.h" |
a844f451 | 36 | #include "xfs_itable.h" |
a844f451 NS |
37 | #include "xfs_ialloc.h" |
38 | #include "xfs_alloc.h" | |
1da177e4 | 39 | #include "xfs_bmap.h" |
ef14f0c1 | 40 | #include "xfs_acl.h" |
1da177e4 LT |
41 | #include "xfs_attr.h" |
42 | #include "xfs_rw.h" | |
1da177e4 | 43 | #include "xfs_error.h" |
1da177e4 LT |
44 | #include "xfs_quota.h" |
45 | #include "xfs_utils.h" | |
a844f451 | 46 | #include "xfs_rtalloc.h" |
1da177e4 | 47 | #include "xfs_trans_space.h" |
1da177e4 | 48 | #include "xfs_log_priv.h" |
2a82b8be | 49 | #include "xfs_filestream.h" |
993386c1 | 50 | #include "xfs_vnodeops.h" |
0b1b213f | 51 | #include "xfs_trace.h" |
1da177e4 | 52 | |
7d4fb40a NS |
53 | /* |
54 | * The maximum pathlen is 1024 bytes. Since the minimum file system | |
55 | * blocksize is 512 bytes, we can get a max of 2 extents back from | |
56 | * bmapi. | |
57 | */ | |
58 | #define SYMLINK_MAPS 2 | |
59 | ||
804c83c3 CH |
60 | STATIC int |
61 | xfs_readlink_bmap( | |
62 | xfs_inode_t *ip, | |
63 | char *link) | |
64 | { | |
65 | xfs_mount_t *mp = ip->i_mount; | |
66 | int pathlen = ip->i_d.di_size; | |
67 | int nmaps = SYMLINK_MAPS; | |
68 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
69 | xfs_daddr_t d; | |
70 | int byte_cnt; | |
71 | int n; | |
72 | xfs_buf_t *bp; | |
73 | int error = 0; | |
74 | ||
75 | error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen), 0, NULL, 0, | |
b4e9181e | 76 | mval, &nmaps, NULL); |
804c83c3 CH |
77 | if (error) |
78 | goto out; | |
79 | ||
80 | for (n = 0; n < nmaps; n++) { | |
81 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
82 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
83 | ||
6ad112bf CH |
84 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), |
85 | XBF_LOCK | XBF_MAPPED | XBF_DONT_BLOCK); | |
5a52c2a5 | 86 | error = xfs_buf_geterror(bp); |
804c83c3 CH |
87 | if (error) { |
88 | xfs_ioerror_alert("xfs_readlink", | |
89 | ip->i_mount, bp, XFS_BUF_ADDR(bp)); | |
90 | xfs_buf_relse(bp); | |
91 | goto out; | |
92 | } | |
93 | if (pathlen < byte_cnt) | |
94 | byte_cnt = pathlen; | |
95 | pathlen -= byte_cnt; | |
96 | ||
62926044 | 97 | memcpy(link, bp->b_addr, byte_cnt); |
804c83c3 CH |
98 | xfs_buf_relse(bp); |
99 | } | |
100 | ||
101 | link[ip->i_d.di_size] = '\0'; | |
102 | error = 0; | |
103 | ||
104 | out: | |
105 | return error; | |
106 | } | |
107 | ||
993386c1 | 108 | int |
1da177e4 | 109 | xfs_readlink( |
993386c1 | 110 | xfs_inode_t *ip, |
804c83c3 | 111 | char *link) |
1da177e4 | 112 | { |
804c83c3 | 113 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 114 | int pathlen; |
1da177e4 | 115 | int error = 0; |
1da177e4 | 116 | |
cca28fb8 | 117 | trace_xfs_readlink(ip); |
1da177e4 LT |
118 | |
119 | if (XFS_FORCED_SHUTDOWN(mp)) | |
120 | return XFS_ERROR(EIO); | |
121 | ||
122 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
123 | ||
124 | ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK); | |
804c83c3 | 125 | ASSERT(ip->i_d.di_size <= MAXPATHLEN); |
1da177e4 | 126 | |
804c83c3 CH |
127 | pathlen = ip->i_d.di_size; |
128 | if (!pathlen) | |
129 | goto out; | |
1da177e4 LT |
130 | |
131 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
804c83c3 CH |
132 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); |
133 | link[pathlen] = '\0'; | |
134 | } else { | |
135 | error = xfs_readlink_bmap(ip, link); | |
1da177e4 LT |
136 | } |
137 | ||
804c83c3 | 138 | out: |
1da177e4 | 139 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
1da177e4 LT |
140 | return error; |
141 | } | |
142 | ||
c56c9631 CH |
143 | /* |
144 | * Flags for xfs_free_eofblocks | |
145 | */ | |
146 | #define XFS_FREE_EOF_TRYLOCK (1<<0) | |
147 | ||
1da177e4 | 148 | /* |
92dfe8d2 DC |
149 | * This is called by xfs_inactive to free any blocks beyond eof |
150 | * when the link count isn't zero and by xfs_dm_punch_hole() when | |
151 | * punching a hole to EOF. | |
1da177e4 | 152 | */ |
d96f8f89 | 153 | STATIC int |
92dfe8d2 | 154 | xfs_free_eofblocks( |
1da177e4 | 155 | xfs_mount_t *mp, |
92dfe8d2 DC |
156 | xfs_inode_t *ip, |
157 | int flags) | |
1da177e4 LT |
158 | { |
159 | xfs_trans_t *tp; | |
160 | int error; | |
161 | xfs_fileoff_t end_fsb; | |
162 | xfs_fileoff_t last_fsb; | |
163 | xfs_filblks_t map_len; | |
164 | int nimaps; | |
165 | xfs_bmbt_irec_t imap; | |
166 | ||
167 | /* | |
168 | * Figure out if there are any blocks beyond the end | |
169 | * of the file. If not, then there is nothing to do. | |
170 | */ | |
ba87ea69 | 171 | end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_size)); |
1da177e4 | 172 | last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
3f34885c | 173 | if (last_fsb <= end_fsb) |
014c2544 | 174 | return 0; |
3f34885c | 175 | map_len = last_fsb - end_fsb; |
1da177e4 LT |
176 | |
177 | nimaps = 1; | |
178 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
541d7d3c | 179 | error = xfs_bmapi(NULL, ip, end_fsb, map_len, 0, |
b4e9181e | 180 | NULL, 0, &imap, &nimaps, NULL); |
1da177e4 LT |
181 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
182 | ||
183 | if (!error && (nimaps != 0) && | |
68bdb6ea YL |
184 | (imap.br_startblock != HOLESTARTBLOCK || |
185 | ip->i_delayed_blks)) { | |
1da177e4 LT |
186 | /* |
187 | * Attach the dquots to the inode up front. | |
188 | */ | |
7d095257 CH |
189 | error = xfs_qm_dqattach(ip, 0); |
190 | if (error) | |
014c2544 | 191 | return error; |
1da177e4 LT |
192 | |
193 | /* | |
194 | * There are blocks after the end of file. | |
195 | * Free them up now by truncating the file to | |
196 | * its current size. | |
197 | */ | |
198 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
199 | ||
c56c9631 CH |
200 | if (flags & XFS_FREE_EOF_TRYLOCK) { |
201 | if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { | |
202 | xfs_trans_cancel(tp, 0); | |
203 | return 0; | |
204 | } | |
205 | } else { | |
92dfe8d2 | 206 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
c56c9631 | 207 | } |
1da177e4 LT |
208 | |
209 | error = xfs_trans_reserve(tp, 0, | |
210 | XFS_ITRUNCATE_LOG_RES(mp), | |
211 | 0, XFS_TRANS_PERM_LOG_RES, | |
212 | XFS_ITRUNCATE_LOG_COUNT); | |
213 | if (error) { | |
214 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
215 | xfs_trans_cancel(tp, 0); | |
216 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 217 | return error; |
1da177e4 LT |
218 | } |
219 | ||
220 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
898621d5 | 221 | xfs_trans_ijoin(tp, ip); |
1da177e4 | 222 | |
8f04c47a | 223 | error = xfs_itruncate_data(&tp, ip, ip->i_size); |
1da177e4 | 224 | if (error) { |
8f04c47a CH |
225 | /* |
226 | * If we get an error at this point we simply don't | |
227 | * bother truncating the file. | |
228 | */ | |
1da177e4 LT |
229 | xfs_trans_cancel(tp, |
230 | (XFS_TRANS_RELEASE_LOG_RES | | |
231 | XFS_TRANS_ABORT)); | |
232 | } else { | |
233 | error = xfs_trans_commit(tp, | |
1c72bf90 | 234 | XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 235 | } |
c56c9631 | 236 | xfs_iunlock(ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL); |
1da177e4 | 237 | } |
014c2544 | 238 | return error; |
1da177e4 LT |
239 | } |
240 | ||
241 | /* | |
242 | * Free a symlink that has blocks associated with it. | |
243 | */ | |
244 | STATIC int | |
245 | xfs_inactive_symlink_rmt( | |
246 | xfs_inode_t *ip, | |
247 | xfs_trans_t **tpp) | |
248 | { | |
249 | xfs_buf_t *bp; | |
250 | int committed; | |
251 | int done; | |
252 | int error; | |
253 | xfs_fsblock_t first_block; | |
254 | xfs_bmap_free_t free_list; | |
255 | int i; | |
256 | xfs_mount_t *mp; | |
257 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
258 | int nmaps; | |
259 | xfs_trans_t *ntp; | |
260 | int size; | |
261 | xfs_trans_t *tp; | |
262 | ||
263 | tp = *tpp; | |
264 | mp = ip->i_mount; | |
265 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); | |
266 | /* | |
267 | * We're freeing a symlink that has some | |
268 | * blocks allocated to it. Free the | |
269 | * blocks here. We know that we've got | |
270 | * either 1 or 2 extents and that we can | |
271 | * free them all in one bunmapi call. | |
272 | */ | |
273 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
274 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
275 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
276 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
277 | xfs_trans_cancel(tp, 0); | |
278 | *tpp = NULL; | |
279 | return error; | |
280 | } | |
281 | /* | |
282 | * Lock the inode, fix the size, and join it to the transaction. | |
283 | * Hold it so in the normal path, we still have it locked for | |
284 | * the second transaction. In the error paths we need it | |
285 | * held so the cancel won't rele it, see below. | |
286 | */ | |
287 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
288 | size = (int)ip->i_d.di_size; | |
289 | ip->i_d.di_size = 0; | |
898621d5 | 290 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
291 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
292 | /* | |
293 | * Find the block(s) so we can inval and unmap them. | |
294 | */ | |
295 | done = 0; | |
9d87c319 | 296 | xfs_bmap_init(&free_list, &first_block); |
e8c96f8c | 297 | nmaps = ARRAY_SIZE(mval); |
1da177e4 LT |
298 | if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size), |
299 | XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps, | |
b4e9181e | 300 | &free_list))) |
1da177e4 LT |
301 | goto error0; |
302 | /* | |
303 | * Invalidate the block(s). | |
304 | */ | |
305 | for (i = 0; i < nmaps; i++) { | |
306 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
307 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
308 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
309 | xfs_trans_binval(tp, bp); | |
310 | } | |
311 | /* | |
312 | * Unmap the dead block(s) to the free_list. | |
313 | */ | |
314 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, | |
b4e9181e | 315 | &first_block, &free_list, &done))) |
1da177e4 LT |
316 | goto error1; |
317 | ASSERT(done); | |
318 | /* | |
319 | * Commit the first transaction. This logs the EFI and the inode. | |
320 | */ | |
f7c99b6f | 321 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
1da177e4 LT |
322 | goto error1; |
323 | /* | |
324 | * The transaction must have been committed, since there were | |
325 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
326 | * The new tp has the extent freeing and EFDs. | |
327 | */ | |
328 | ASSERT(committed); | |
329 | /* | |
330 | * The first xact was committed, so add the inode to the new one. | |
331 | * Mark it dirty so it will be logged and moved forward in the log as | |
332 | * part of every commit. | |
333 | */ | |
898621d5 | 334 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
335 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
336 | /* | |
337 | * Get a new, empty transaction to return to our caller. | |
338 | */ | |
339 | ntp = xfs_trans_dup(tp); | |
340 | /* | |
c41564b5 | 341 | * Commit the transaction containing extent freeing and EFDs. |
1da177e4 LT |
342 | * If we get an error on the commit here or on the reserve below, |
343 | * we need to unlock the inode since the new transaction doesn't | |
344 | * have the inode attached. | |
345 | */ | |
1c72bf90 | 346 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
347 | tp = ntp; |
348 | if (error) { | |
349 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
350 | goto error0; | |
351 | } | |
cc09c0dc DC |
352 | /* |
353 | * transaction commit worked ok so we can drop the extra ticket | |
354 | * reference that we gained in xfs_trans_dup() | |
355 | */ | |
356 | xfs_log_ticket_put(tp->t_ticket); | |
357 | ||
1da177e4 LT |
358 | /* |
359 | * Remove the memory for extent descriptions (just bookkeeping). | |
360 | */ | |
361 | if (ip->i_df.if_bytes) | |
362 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
363 | ASSERT(ip->i_df.if_bytes == 0); | |
364 | /* | |
365 | * Put an itruncate log reservation in the new transaction | |
366 | * for our caller. | |
367 | */ | |
368 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
369 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
370 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
371 | goto error0; | |
372 | } | |
373 | /* | |
374 | * Return with the inode locked but not joined to the transaction. | |
375 | */ | |
376 | *tpp = tp; | |
377 | return 0; | |
378 | ||
379 | error1: | |
380 | xfs_bmap_cancel(&free_list); | |
381 | error0: | |
382 | /* | |
383 | * Have to come here with the inode locked and either | |
384 | * (held and in the transaction) or (not in the transaction). | |
385 | * If the inode isn't held then cancel would iput it, but | |
386 | * that's wrong since this is inactive and the vnode ref | |
387 | * count is 0 already. | |
388 | * Cancel won't do anything to the inode if held, but it still | |
389 | * needs to be locked until the cancel is done, if it was | |
390 | * joined to the transaction. | |
391 | */ | |
392 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
393 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
394 | *tpp = NULL; | |
395 | return error; | |
396 | ||
397 | } | |
398 | ||
399 | STATIC int | |
400 | xfs_inactive_symlink_local( | |
401 | xfs_inode_t *ip, | |
402 | xfs_trans_t **tpp) | |
403 | { | |
404 | int error; | |
405 | ||
406 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); | |
407 | /* | |
408 | * We're freeing a symlink which fit into | |
409 | * the inode. Just free the memory used | |
410 | * to hold the old symlink. | |
411 | */ | |
412 | error = xfs_trans_reserve(*tpp, 0, | |
413 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), | |
414 | 0, XFS_TRANS_PERM_LOG_RES, | |
415 | XFS_ITRUNCATE_LOG_COUNT); | |
416 | ||
417 | if (error) { | |
418 | xfs_trans_cancel(*tpp, 0); | |
419 | *tpp = NULL; | |
014c2544 | 420 | return error; |
1da177e4 LT |
421 | } |
422 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
423 | ||
424 | /* | |
425 | * Zero length symlinks _can_ exist. | |
426 | */ | |
427 | if (ip->i_df.if_bytes > 0) { | |
428 | xfs_idata_realloc(ip, | |
429 | -(ip->i_df.if_bytes), | |
430 | XFS_DATA_FORK); | |
431 | ASSERT(ip->i_df.if_bytes == 0); | |
432 | } | |
014c2544 | 433 | return 0; |
1da177e4 LT |
434 | } |
435 | ||
1da177e4 LT |
436 | STATIC int |
437 | xfs_inactive_attrs( | |
438 | xfs_inode_t *ip, | |
439 | xfs_trans_t **tpp) | |
440 | { | |
441 | xfs_trans_t *tp; | |
442 | int error; | |
443 | xfs_mount_t *mp; | |
444 | ||
579aa9ca | 445 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
1da177e4 LT |
446 | tp = *tpp; |
447 | mp = ip->i_mount; | |
448 | ASSERT(ip->i_d.di_forkoff != 0); | |
e5720eec | 449 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 450 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
e5720eec DC |
451 | if (error) |
452 | goto error_unlock; | |
1da177e4 LT |
453 | |
454 | error = xfs_attr_inactive(ip); | |
e5720eec DC |
455 | if (error) |
456 | goto error_unlock; | |
1da177e4 LT |
457 | |
458 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
459 | error = xfs_trans_reserve(tp, 0, | |
460 | XFS_IFREE_LOG_RES(mp), | |
461 | 0, XFS_TRANS_PERM_LOG_RES, | |
462 | XFS_INACTIVE_LOG_COUNT); | |
e5720eec DC |
463 | if (error) |
464 | goto error_cancel; | |
1da177e4 LT |
465 | |
466 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
898621d5 | 467 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
468 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
469 | ||
470 | ASSERT(ip->i_d.di_anextents == 0); | |
471 | ||
472 | *tpp = tp; | |
014c2544 | 473 | return 0; |
e5720eec DC |
474 | |
475 | error_cancel: | |
476 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
477 | xfs_trans_cancel(tp, 0); | |
478 | error_unlock: | |
479 | *tpp = NULL; | |
480 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
481 | return error; | |
1da177e4 LT |
482 | } |
483 | ||
993386c1 | 484 | int |
1da177e4 | 485 | xfs_release( |
993386c1 | 486 | xfs_inode_t *ip) |
1da177e4 | 487 | { |
993386c1 | 488 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
489 | int error; |
490 | ||
42173f68 | 491 | if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) |
1da177e4 | 492 | return 0; |
1da177e4 LT |
493 | |
494 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 495 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
496 | return 0; |
497 | ||
2a82b8be | 498 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
b3aea4ed CH |
499 | int truncated; |
500 | ||
2a82b8be DC |
501 | /* |
502 | * If we are using filestreams, and we have an unlinked | |
503 | * file that we are processing the last close on, then nothing | |
504 | * will be able to reopen and write to this file. Purge this | |
505 | * inode from the filestreams cache so that it doesn't delay | |
506 | * teardown of the inode. | |
507 | */ | |
508 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) | |
509 | xfs_filestream_deassociate(ip); | |
510 | ||
fbf3ce8d CH |
511 | /* |
512 | * If we previously truncated this file and removed old data | |
513 | * in the process, we want to initiate "early" writeout on | |
514 | * the last close. This is an attempt to combat the notorious | |
25985edc | 515 | * NULL files problem which is particularly noticeable from a |
fbf3ce8d CH |
516 | * truncate down, buffered (re-)write (delalloc), followed by |
517 | * a crash. What we are effectively doing here is | |
518 | * significantly reducing the time window where we'd otherwise | |
519 | * be exposed to that problem. | |
520 | */ | |
09262b43 | 521 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
df4368a1 DC |
522 | if (truncated) { |
523 | xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); | |
524 | if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) | |
525 | xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); | |
526 | } | |
fbf3ce8d CH |
527 | } |
528 | ||
6e857567 DC |
529 | if (ip->i_d.di_nlink == 0) |
530 | return 0; | |
c56c9631 | 531 | |
6e857567 DC |
532 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && |
533 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || | |
534 | ip->i_delayed_blks > 0)) && | |
535 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && | |
536 | (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { | |
537 | ||
538 | /* | |
539 | * If we can't get the iolock just skip truncating the blocks | |
540 | * past EOF because we could deadlock with the mmap_sem | |
541 | * otherwise. We'll get another chance to drop them once the | |
542 | * last reference to the inode is dropped, so we'll never leak | |
543 | * blocks permanently. | |
544 | * | |
545 | * Further, check if the inode is being opened, written and | |
546 | * closed frequently and we have delayed allocation blocks | |
25985edc | 547 | * outstanding (e.g. streaming writes from the NFS server), |
6e857567 DC |
548 | * truncating the blocks past EOF will cause fragmentation to |
549 | * occur. | |
550 | * | |
551 | * In this case don't do the truncation, either, but we have to | |
552 | * be careful how we detect this case. Blocks beyond EOF show | |
553 | * up as i_delayed_blks even when the inode is clean, so we | |
554 | * need to truncate them away first before checking for a dirty | |
555 | * release. Hence on the first dirty close we will still remove | |
556 | * the speculative allocation, but after that we will leave it | |
557 | * in place. | |
558 | */ | |
559 | if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) | |
560 | return 0; | |
1da177e4 | 561 | |
6e857567 DC |
562 | error = xfs_free_eofblocks(mp, ip, |
563 | XFS_FREE_EOF_TRYLOCK); | |
564 | if (error) | |
565 | return error; | |
566 | ||
567 | /* delalloc blocks after truncation means it really is dirty */ | |
568 | if (ip->i_delayed_blks) | |
569 | xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); | |
570 | } | |
1da177e4 LT |
571 | return 0; |
572 | } | |
573 | ||
574 | /* | |
575 | * xfs_inactive | |
576 | * | |
577 | * This is called when the vnode reference count for the vnode | |
578 | * goes to zero. If the file has been unlinked, then it must | |
579 | * now be truncated. Also, we clear all of the read-ahead state | |
580 | * kept for the inode here since the file is now closed. | |
581 | */ | |
993386c1 | 582 | int |
1da177e4 | 583 | xfs_inactive( |
993386c1 | 584 | xfs_inode_t *ip) |
1da177e4 | 585 | { |
67fcaa73 | 586 | xfs_bmap_free_t free_list; |
1da177e4 LT |
587 | xfs_fsblock_t first_block; |
588 | int committed; | |
589 | xfs_trans_t *tp; | |
590 | xfs_mount_t *mp; | |
591 | int error; | |
592 | int truncate; | |
593 | ||
1da177e4 LT |
594 | /* |
595 | * If the inode is already free, then there can be nothing | |
596 | * to clean up here. | |
597 | */ | |
cb4c8cc1 | 598 | if (ip->i_d.di_mode == 0 || is_bad_inode(VFS_I(ip))) { |
1da177e4 LT |
599 | ASSERT(ip->i_df.if_real_bytes == 0); |
600 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
601 | return VN_INACTIVE_CACHE; | |
602 | } | |
603 | ||
604 | /* | |
605 | * Only do a truncate if it's a regular file with | |
606 | * some actual space in it. It's OK to look at the | |
607 | * inode's fields without the lock because we're the | |
608 | * only one with a reference to the inode. | |
609 | */ | |
610 | truncate = ((ip->i_d.di_nlink == 0) && | |
ba87ea69 LM |
611 | ((ip->i_d.di_size != 0) || (ip->i_size != 0) || |
612 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && | |
1da177e4 LT |
613 | ((ip->i_d.di_mode & S_IFMT) == S_IFREG)); |
614 | ||
615 | mp = ip->i_mount; | |
616 | ||
1da177e4 LT |
617 | error = 0; |
618 | ||
619 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 620 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
621 | goto out; |
622 | ||
623 | if (ip->i_d.di_nlink != 0) { | |
624 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
df80c933 | 625 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
68bdb6ea | 626 | ip->i_delayed_blks > 0)) && |
dd9f438e NS |
627 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
628 | (!(ip->i_d.di_flags & | |
629 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || | |
630 | (ip->i_delayed_blks != 0)))) { | |
c56c9631 | 631 | error = xfs_free_eofblocks(mp, ip, 0); |
92dfe8d2 | 632 | if (error) |
014c2544 | 633 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
634 | } |
635 | goto out; | |
636 | } | |
637 | ||
638 | ASSERT(ip->i_d.di_nlink == 0); | |
639 | ||
7d095257 CH |
640 | error = xfs_qm_dqattach(ip, 0); |
641 | if (error) | |
014c2544 | 642 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
643 | |
644 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
645 | if (truncate) { | |
1da177e4 LT |
646 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
647 | ||
857b9778 | 648 | xfs_ioend_wait(ip); |
1da177e4 LT |
649 | |
650 | error = xfs_trans_reserve(tp, 0, | |
651 | XFS_ITRUNCATE_LOG_RES(mp), | |
652 | 0, XFS_TRANS_PERM_LOG_RES, | |
653 | XFS_ITRUNCATE_LOG_COUNT); | |
654 | if (error) { | |
655 | /* Don't call itruncate_cleanup */ | |
656 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
657 | xfs_trans_cancel(tp, 0); | |
658 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 659 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
660 | } |
661 | ||
662 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
898621d5 | 663 | xfs_trans_ijoin(tp, ip); |
1da177e4 | 664 | |
8f04c47a | 665 | error = xfs_itruncate_data(&tp, ip, 0); |
1da177e4 LT |
666 | if (error) { |
667 | xfs_trans_cancel(tp, | |
668 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
669 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
014c2544 | 670 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
671 | } |
672 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) { | |
673 | ||
674 | /* | |
675 | * If we get an error while cleaning up a | |
676 | * symlink we bail out. | |
677 | */ | |
678 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? | |
679 | xfs_inactive_symlink_rmt(ip, &tp) : | |
680 | xfs_inactive_symlink_local(ip, &tp); | |
681 | ||
682 | if (error) { | |
683 | ASSERT(tp == NULL); | |
014c2544 | 684 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
685 | } |
686 | ||
898621d5 | 687 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
688 | } else { |
689 | error = xfs_trans_reserve(tp, 0, | |
690 | XFS_IFREE_LOG_RES(mp), | |
691 | 0, XFS_TRANS_PERM_LOG_RES, | |
692 | XFS_INACTIVE_LOG_COUNT); | |
693 | if (error) { | |
694 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
695 | xfs_trans_cancel(tp, 0); | |
014c2544 | 696 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
697 | } |
698 | ||
699 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
898621d5 | 700 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
701 | } |
702 | ||
703 | /* | |
704 | * If there are attributes associated with the file | |
705 | * then blow them away now. The code calls a routine | |
706 | * that recursively deconstructs the attribute fork. | |
707 | * We need to just commit the current transaction | |
708 | * because we can't use it for xfs_attr_inactive(). | |
709 | */ | |
710 | if (ip->i_d.di_anextents > 0) { | |
711 | error = xfs_inactive_attrs(ip, &tp); | |
712 | /* | |
713 | * If we got an error, the transaction is already | |
714 | * cancelled, and the inode is unlocked. Just get out. | |
715 | */ | |
716 | if (error) | |
014c2544 | 717 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
718 | } else if (ip->i_afp) { |
719 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
720 | } | |
721 | ||
722 | /* | |
723 | * Free the inode. | |
724 | */ | |
9d87c319 | 725 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
726 | error = xfs_ifree(tp, ip, &free_list); |
727 | if (error) { | |
728 | /* | |
729 | * If we fail to free the inode, shut down. The cancel | |
730 | * might do that, we need to make sure. Otherwise the | |
731 | * inode might be lost for a long time or forever. | |
732 | */ | |
733 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
0b932ccc DC |
734 | xfs_notice(mp, "%s: xfs_ifree returned error %d", |
735 | __func__, error); | |
7d04a335 | 736 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
737 | } |
738 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
739 | } else { | |
740 | /* | |
741 | * Credit the quota account(s). The inode is gone. | |
742 | */ | |
7d095257 | 743 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
1da177e4 LT |
744 | |
745 | /* | |
78e9da77 DC |
746 | * Just ignore errors at this point. There is nothing we can |
747 | * do except to try to keep going. Make sure it's not a silent | |
748 | * error. | |
1da177e4 | 749 | */ |
78e9da77 DC |
750 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
751 | if (error) | |
53487786 DC |
752 | xfs_notice(mp, "%s: xfs_bmap_finish returned error %d", |
753 | __func__, error); | |
78e9da77 DC |
754 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
755 | if (error) | |
53487786 DC |
756 | xfs_notice(mp, "%s: xfs_trans_commit returned error %d", |
757 | __func__, error); | |
1da177e4 | 758 | } |
7d095257 | 759 | |
1da177e4 LT |
760 | /* |
761 | * Release the dquots held by inode, if any. | |
762 | */ | |
7d095257 | 763 | xfs_qm_dqdetach(ip); |
1da177e4 LT |
764 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
765 | ||
766 | out: | |
767 | return VN_INACTIVE_CACHE; | |
768 | } | |
769 | ||
384f3ced BN |
770 | /* |
771 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
772 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
773 | * ci_name->name will point to a the actual name (caller must free) or | |
774 | * will be set to NULL if an exact match is found. | |
775 | */ | |
993386c1 | 776 | int |
1da177e4 | 777 | xfs_lookup( |
993386c1 | 778 | xfs_inode_t *dp, |
556b8b16 | 779 | struct xfs_name *name, |
384f3ced BN |
780 | xfs_inode_t **ipp, |
781 | struct xfs_name *ci_name) | |
1da177e4 | 782 | { |
eca450b7 | 783 | xfs_ino_t inum; |
1da177e4 LT |
784 | int error; |
785 | uint lock_mode; | |
1da177e4 | 786 | |
cca28fb8 | 787 | trace_xfs_lookup(dp, name); |
1da177e4 LT |
788 | |
789 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
790 | return XFS_ERROR(EIO); | |
791 | ||
792 | lock_mode = xfs_ilock_map_shared(dp); | |
384f3ced | 793 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
1da177e4 | 794 | xfs_iunlock_map_shared(dp, lock_mode); |
eca450b7 CH |
795 | |
796 | if (error) | |
797 | goto out; | |
798 | ||
7b6259e7 | 799 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp); |
eca450b7 | 800 | if (error) |
384f3ced | 801 | goto out_free_name; |
eca450b7 | 802 | |
eca450b7 CH |
803 | return 0; |
804 | ||
384f3ced BN |
805 | out_free_name: |
806 | if (ci_name) | |
807 | kmem_free(ci_name->name); | |
808 | out: | |
eca450b7 | 809 | *ipp = NULL; |
1da177e4 LT |
810 | return error; |
811 | } | |
812 | ||
993386c1 | 813 | int |
1da177e4 | 814 | xfs_create( |
993386c1 | 815 | xfs_inode_t *dp, |
556b8b16 | 816 | struct xfs_name *name, |
3e5daf05 CH |
817 | mode_t mode, |
818 | xfs_dev_t rdev, | |
6c77b0ea | 819 | xfs_inode_t **ipp) |
1da177e4 | 820 | { |
517b5e8c CH |
821 | int is_dir = S_ISDIR(mode); |
822 | struct xfs_mount *mp = dp->i_mount; | |
823 | struct xfs_inode *ip = NULL; | |
824 | struct xfs_trans *tp = NULL; | |
556b8b16 | 825 | int error; |
1da177e4 LT |
826 | xfs_bmap_free_t free_list; |
827 | xfs_fsblock_t first_block; | |
993386c1 | 828 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
829 | uint cancel_flags; |
830 | int committed; | |
6743099c | 831 | prid_t prid; |
517b5e8c CH |
832 | struct xfs_dquot *udqp = NULL; |
833 | struct xfs_dquot *gdqp = NULL; | |
1da177e4 | 834 | uint resblks; |
517b5e8c CH |
835 | uint log_res; |
836 | uint log_count; | |
1da177e4 | 837 | |
cca28fb8 | 838 | trace_xfs_create(dp, name); |
1da177e4 | 839 | |
517b5e8c CH |
840 | if (XFS_FORCED_SHUTDOWN(mp)) |
841 | return XFS_ERROR(EIO); | |
842 | ||
365ca83d | 843 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
6743099c | 844 | prid = xfs_get_projid(dp); |
1da177e4 | 845 | else |
6743099c | 846 | prid = XFS_PROJID_DEFAULT; |
1da177e4 LT |
847 | |
848 | /* | |
849 | * Make sure that we have allocated dquot(s) on disk. | |
850 | */ | |
7d095257 | 851 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
517b5e8c | 852 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1da177e4 | 853 | if (error) |
ec3ba85f | 854 | return error; |
1da177e4 | 855 | |
517b5e8c CH |
856 | if (is_dir) { |
857 | rdev = 0; | |
858 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
859 | log_res = XFS_MKDIR_LOG_RES(mp); | |
860 | log_count = XFS_MKDIR_LOG_COUNT; | |
861 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); | |
862 | } else { | |
863 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
864 | log_res = XFS_CREATE_LOG_RES(mp); | |
865 | log_count = XFS_CREATE_LOG_COUNT; | |
866 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); | |
867 | } | |
1da177e4 | 868 | |
1da177e4 | 869 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
517b5e8c | 870 | |
1da177e4 LT |
871 | /* |
872 | * Initially assume that the file does not exist and | |
873 | * reserve the resources for that case. If that is not | |
874 | * the case we'll drop the one we have and get a more | |
875 | * appropriate transaction later. | |
876 | */ | |
517b5e8c CH |
877 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
878 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 | 879 | if (error == ENOSPC) { |
153fec43 DC |
880 | /* flush outstanding delalloc blocks and retry */ |
881 | xfs_flush_inodes(dp); | |
4734d401 CH |
882 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
883 | XFS_TRANS_PERM_LOG_RES, log_count); | |
153fec43 DC |
884 | } |
885 | if (error == ENOSPC) { | |
886 | /* No space at all so try a "no-allocation" reservation */ | |
1da177e4 | 887 | resblks = 0; |
517b5e8c CH |
888 | error = xfs_trans_reserve(tp, 0, log_res, 0, |
889 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 LT |
890 | } |
891 | if (error) { | |
892 | cancel_flags = 0; | |
517b5e8c | 893 | goto out_trans_cancel; |
1da177e4 LT |
894 | } |
895 | ||
f7c66ce3 | 896 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 897 | unlock_dp_on_error = B_TRUE; |
1da177e4 | 898 | |
517b5e8c CH |
899 | /* |
900 | * Check for directory link count overflow. | |
901 | */ | |
902 | if (is_dir && dp->i_d.di_nlink >= XFS_MAXLINK) { | |
903 | error = XFS_ERROR(EMLINK); | |
904 | goto out_trans_cancel; | |
905 | } | |
1da177e4 | 906 | |
517b5e8c | 907 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
908 | |
909 | /* | |
910 | * Reserve disk quota and the inode. | |
911 | */ | |
7d095257 | 912 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 | 913 | if (error) |
517b5e8c | 914 | goto out_trans_cancel; |
1da177e4 | 915 | |
556b8b16 BN |
916 | error = xfs_dir_canenter(tp, dp, name, resblks); |
917 | if (error) | |
517b5e8c CH |
918 | goto out_trans_cancel; |
919 | ||
920 | /* | |
921 | * A newly created regular or special file just has one directory | |
922 | * entry pointing to them, but a directory also the "." entry | |
923 | * pointing to itself. | |
924 | */ | |
6c77b0ea | 925 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, |
517b5e8c | 926 | prid, resblks > 0, &ip, &committed); |
1da177e4 LT |
927 | if (error) { |
928 | if (error == ENOSPC) | |
517b5e8c CH |
929 | goto out_trans_cancel; |
930 | goto out_trans_abort; | |
1da177e4 | 931 | } |
1da177e4 | 932 | |
1da177e4 | 933 | /* |
993386c1 CH |
934 | * Now we join the directory inode to the transaction. We do not do it |
935 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
936 | * (and release all the locks). An error from here on will result in | |
937 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
938 | * error path. | |
1da177e4 | 939 | */ |
898621d5 | 940 | xfs_trans_ijoin_ref(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 941 | unlock_dp_on_error = B_FALSE; |
1da177e4 | 942 | |
556b8b16 | 943 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
f6c2d1fa NS |
944 | &first_block, &free_list, resblks ? |
945 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
946 | if (error) { |
947 | ASSERT(error != ENOSPC); | |
517b5e8c | 948 | goto out_trans_abort; |
1da177e4 | 949 | } |
dcd79a14 | 950 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
951 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
952 | ||
517b5e8c CH |
953 | if (is_dir) { |
954 | error = xfs_dir_init(tp, ip, dp); | |
955 | if (error) | |
956 | goto out_bmap_cancel; | |
957 | ||
958 | error = xfs_bumplink(tp, dp); | |
959 | if (error) | |
960 | goto out_bmap_cancel; | |
961 | } | |
962 | ||
1da177e4 LT |
963 | /* |
964 | * If this is a synchronous mount, make sure that the | |
965 | * create transaction goes to disk before returning to | |
966 | * the user. | |
967 | */ | |
517b5e8c | 968 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 969 | xfs_trans_set_sync(tp); |
1da177e4 | 970 | |
1da177e4 LT |
971 | /* |
972 | * Attach the dquot(s) to the inodes and modify them incore. | |
973 | * These ids of the inode couldn't have changed since the new | |
974 | * inode has been locked ever since it was created. | |
975 | */ | |
7d095257 | 976 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 | 977 | |
f7c99b6f | 978 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
517b5e8c | 979 | if (error) |
ec3ba85f | 980 | goto out_bmap_cancel; |
1da177e4 | 981 | |
1c72bf90 | 982 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
ec3ba85f CH |
983 | if (error) |
984 | goto out_release_inode; | |
1da177e4 | 985 | |
7d095257 CH |
986 | xfs_qm_dqrele(udqp); |
987 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 988 | |
979ebab1 | 989 | *ipp = ip; |
288699fe | 990 | return 0; |
1da177e4 | 991 | |
517b5e8c CH |
992 | out_bmap_cancel: |
993 | xfs_bmap_cancel(&free_list); | |
994 | out_trans_abort: | |
1da177e4 | 995 | cancel_flags |= XFS_TRANS_ABORT; |
517b5e8c CH |
996 | out_trans_cancel: |
997 | xfs_trans_cancel(tp, cancel_flags); | |
ec3ba85f CH |
998 | out_release_inode: |
999 | /* | |
1000 | * Wait until after the current transaction is aborted to | |
1001 | * release the inode. This prevents recursive transactions | |
1002 | * and deadlocks from xfs_inactive. | |
1003 | */ | |
1004 | if (ip) | |
1005 | IRELE(ip); | |
1006 | ||
7d095257 CH |
1007 | xfs_qm_dqrele(udqp); |
1008 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1009 | |
993386c1 CH |
1010 | if (unlock_dp_on_error) |
1011 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
288699fe | 1012 | return error; |
1da177e4 LT |
1013 | } |
1014 | ||
1da177e4 LT |
1015 | #ifdef DEBUG |
1016 | int xfs_locked_n; | |
1017 | int xfs_small_retries; | |
1018 | int xfs_middle_retries; | |
1019 | int xfs_lots_retries; | |
1020 | int xfs_lock_delays; | |
1021 | #endif | |
1022 | ||
f7c66ce3 LM |
1023 | /* |
1024 | * Bump the subclass so xfs_lock_inodes() acquires each lock with | |
1025 | * a different value | |
1026 | */ | |
1027 | static inline int | |
1028 | xfs_lock_inumorder(int lock_mode, int subclass) | |
1029 | { | |
1030 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) | |
0f1145cc | 1031 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
f7c66ce3 | 1032 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
0f1145cc | 1033 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
f7c66ce3 LM |
1034 | |
1035 | return lock_mode; | |
1036 | } | |
1037 | ||
1da177e4 LT |
1038 | /* |
1039 | * The following routine will lock n inodes in exclusive mode. | |
1040 | * We assume the caller calls us with the inodes in i_ino order. | |
1041 | * | |
1042 | * We need to detect deadlock where an inode that we lock | |
1043 | * is in the AIL and we start waiting for another inode that is locked | |
1044 | * by a thread in a long running transaction (such as truncate). This can | |
1045 | * result in deadlock since the long running trans might need to wait | |
1046 | * for the inode we just locked in order to push the tail and free space | |
1047 | * in the log. | |
1048 | */ | |
1049 | void | |
1050 | xfs_lock_inodes( | |
1051 | xfs_inode_t **ips, | |
1052 | int inodes, | |
1da177e4 LT |
1053 | uint lock_mode) |
1054 | { | |
1055 | int attempts = 0, i, j, try_lock; | |
1056 | xfs_log_item_t *lp; | |
1057 | ||
1058 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ | |
1059 | ||
cfa853e4 CH |
1060 | try_lock = 0; |
1061 | i = 0; | |
1da177e4 LT |
1062 | |
1063 | again: | |
1064 | for (; i < inodes; i++) { | |
1065 | ASSERT(ips[i]); | |
1066 | ||
1067 | if (i && (ips[i] == ips[i-1])) /* Already locked */ | |
1068 | continue; | |
1069 | ||
1070 | /* | |
1071 | * If try_lock is not set yet, make sure all locked inodes | |
1072 | * are not in the AIL. | |
1073 | * If any are, set try_lock to be used later. | |
1074 | */ | |
1075 | ||
1076 | if (!try_lock) { | |
1077 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
1078 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
1079 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1080 | try_lock++; | |
1081 | } | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * If any of the previous locks we have locked is in the AIL, | |
1087 | * we must TRY to get the second and subsequent locks. If | |
1088 | * we can't get any, we must release all we have | |
1089 | * and try again. | |
1090 | */ | |
1091 | ||
1092 | if (try_lock) { | |
1093 | /* try_lock must be 0 if i is 0. */ | |
1094 | /* | |
1095 | * try_lock means we have an inode locked | |
1096 | * that is in the AIL. | |
1097 | */ | |
1098 | ASSERT(i != 0); | |
f7c66ce3 | 1099 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
1da177e4 LT |
1100 | attempts++; |
1101 | ||
1102 | /* | |
1103 | * Unlock all previous guys and try again. | |
1104 | * xfs_iunlock will try to push the tail | |
1105 | * if the inode is in the AIL. | |
1106 | */ | |
1107 | ||
1108 | for(j = i - 1; j >= 0; j--) { | |
1109 | ||
1110 | /* | |
1111 | * Check to see if we've already | |
1112 | * unlocked this one. | |
1113 | * Not the first one going back, | |
1114 | * and the inode ptr is the same. | |
1115 | */ | |
1116 | if ((j != (i - 1)) && ips[j] == | |
1117 | ips[j+1]) | |
1118 | continue; | |
1119 | ||
1120 | xfs_iunlock(ips[j], lock_mode); | |
1121 | } | |
1122 | ||
1123 | if ((attempts % 5) == 0) { | |
1124 | delay(1); /* Don't just spin the CPU */ | |
1125 | #ifdef DEBUG | |
1126 | xfs_lock_delays++; | |
1127 | #endif | |
1128 | } | |
1129 | i = 0; | |
1130 | try_lock = 0; | |
1131 | goto again; | |
1132 | } | |
1133 | } else { | |
f7c66ce3 | 1134 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
1da177e4 LT |
1135 | } |
1136 | } | |
1137 | ||
1138 | #ifdef DEBUG | |
1139 | if (attempts) { | |
1140 | if (attempts < 5) xfs_small_retries++; | |
1141 | else if (attempts < 100) xfs_middle_retries++; | |
1142 | else xfs_lots_retries++; | |
1143 | } else { | |
1144 | xfs_locked_n++; | |
1145 | } | |
1146 | #endif | |
1147 | } | |
1148 | ||
f9114eba DC |
1149 | /* |
1150 | * xfs_lock_two_inodes() can only be used to lock one type of lock | |
1151 | * at a time - the iolock or the ilock, but not both at once. If | |
1152 | * we lock both at once, lockdep will report false positives saying | |
1153 | * we have violated locking orders. | |
1154 | */ | |
e1cccd91 CH |
1155 | void |
1156 | xfs_lock_two_inodes( | |
1157 | xfs_inode_t *ip0, | |
1158 | xfs_inode_t *ip1, | |
1159 | uint lock_mode) | |
1160 | { | |
1161 | xfs_inode_t *temp; | |
1162 | int attempts = 0; | |
1163 | xfs_log_item_t *lp; | |
1164 | ||
f9114eba DC |
1165 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
1166 | ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0); | |
e1cccd91 CH |
1167 | ASSERT(ip0->i_ino != ip1->i_ino); |
1168 | ||
1169 | if (ip0->i_ino > ip1->i_ino) { | |
1170 | temp = ip0; | |
1171 | ip0 = ip1; | |
1172 | ip1 = temp; | |
1173 | } | |
1174 | ||
1175 | again: | |
1176 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
1177 | ||
1178 | /* | |
1179 | * If the first lock we have locked is in the AIL, we must TRY to get | |
1180 | * the second lock. If we can't get it, we must release the first one | |
1181 | * and try again. | |
1182 | */ | |
1183 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
1184 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1185 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
1186 | xfs_iunlock(ip0, lock_mode); | |
1187 | if ((++attempts % 5) == 0) | |
1188 | delay(1); /* Don't just spin the CPU */ | |
1189 | goto again; | |
1190 | } | |
1191 | } else { | |
1192 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
1193 | } | |
1194 | } | |
1195 | ||
993386c1 | 1196 | int |
1da177e4 | 1197 | xfs_remove( |
993386c1 | 1198 | xfs_inode_t *dp, |
556b8b16 BN |
1199 | struct xfs_name *name, |
1200 | xfs_inode_t *ip) | |
1da177e4 | 1201 | { |
993386c1 | 1202 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1203 | xfs_trans_t *tp = NULL; |
8f112e3b | 1204 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
1da177e4 LT |
1205 | int error = 0; |
1206 | xfs_bmap_free_t free_list; | |
1207 | xfs_fsblock_t first_block; | |
1208 | int cancel_flags; | |
1209 | int committed; | |
1da177e4 LT |
1210 | int link_zero; |
1211 | uint resblks; | |
8f112e3b | 1212 | uint log_count; |
1da177e4 | 1213 | |
cca28fb8 | 1214 | trace_xfs_remove(dp, name); |
1da177e4 | 1215 | |
1da177e4 LT |
1216 | if (XFS_FORCED_SHUTDOWN(mp)) |
1217 | return XFS_ERROR(EIO); | |
1218 | ||
7d095257 | 1219 | error = xfs_qm_dqattach(dp, 0); |
8f112e3b CH |
1220 | if (error) |
1221 | goto std_return; | |
1222 | ||
7d095257 | 1223 | error = xfs_qm_dqattach(ip, 0); |
8f112e3b | 1224 | if (error) |
1da177e4 | 1225 | goto std_return; |
1da177e4 | 1226 | |
8f112e3b CH |
1227 | if (is_dir) { |
1228 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); | |
1229 | log_count = XFS_DEFAULT_LOG_COUNT; | |
1230 | } else { | |
1231 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); | |
1232 | log_count = XFS_REMOVE_LOG_COUNT; | |
1233 | } | |
1da177e4 | 1234 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
8f112e3b | 1235 | |
1da177e4 LT |
1236 | /* |
1237 | * We try to get the real space reservation first, | |
1238 | * allowing for directory btree deletion(s) implying | |
1239 | * possible bmap insert(s). If we can't get the space | |
1240 | * reservation then we use 0 instead, and avoid the bmap | |
1241 | * btree insert(s) in the directory code by, if the bmap | |
1242 | * insert tries to happen, instead trimming the LAST | |
1243 | * block from the directory. | |
1244 | */ | |
1245 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
1246 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1247 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1248 | if (error == ENOSPC) { |
1249 | resblks = 0; | |
1250 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1251 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1252 | } |
1253 | if (error) { | |
1254 | ASSERT(error != ENOSPC); | |
8f112e3b CH |
1255 | cancel_flags = 0; |
1256 | goto out_trans_cancel; | |
1da177e4 LT |
1257 | } |
1258 | ||
e1cccd91 | 1259 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 1260 | |
898621d5 CH |
1261 | xfs_trans_ijoin_ref(tp, dp, XFS_ILOCK_EXCL); |
1262 | xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL); | |
1da177e4 | 1263 | |
8f112e3b CH |
1264 | /* |
1265 | * If we're removing a directory perform some additional validation. | |
1266 | */ | |
1267 | if (is_dir) { | |
1268 | ASSERT(ip->i_d.di_nlink >= 2); | |
1269 | if (ip->i_d.di_nlink != 2) { | |
1270 | error = XFS_ERROR(ENOTEMPTY); | |
1271 | goto out_trans_cancel; | |
1272 | } | |
1273 | if (!xfs_dir_isempty(ip)) { | |
1274 | error = XFS_ERROR(ENOTEMPTY); | |
1275 | goto out_trans_cancel; | |
1276 | } | |
1277 | } | |
1278 | ||
9d87c319 | 1279 | xfs_bmap_init(&free_list, &first_block); |
556b8b16 | 1280 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
d4377d84 | 1281 | &first_block, &free_list, resblks); |
1da177e4 LT |
1282 | if (error) { |
1283 | ASSERT(error != ENOENT); | |
8f112e3b | 1284 | goto out_bmap_cancel; |
1da177e4 | 1285 | } |
dcd79a14 | 1286 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 | 1287 | |
8f112e3b CH |
1288 | if (is_dir) { |
1289 | /* | |
1290 | * Drop the link from ip's "..". | |
1291 | */ | |
1292 | error = xfs_droplink(tp, dp); | |
1293 | if (error) | |
1294 | goto out_bmap_cancel; | |
1295 | ||
1296 | /* | |
2b7035fd | 1297 | * Drop the "." link from ip to self. |
8f112e3b CH |
1298 | */ |
1299 | error = xfs_droplink(tp, ip); | |
1300 | if (error) | |
1301 | goto out_bmap_cancel; | |
1302 | } else { | |
1303 | /* | |
1304 | * When removing a non-directory we need to log the parent | |
26c52951 DC |
1305 | * inode here. For a directory this is done implicitly |
1306 | * by the xfs_droplink call for the ".." entry. | |
8f112e3b CH |
1307 | */ |
1308 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1da177e4 LT |
1309 | } |
1310 | ||
8f112e3b | 1311 | /* |
2b7035fd | 1312 | * Drop the link from dp to ip. |
8f112e3b CH |
1313 | */ |
1314 | error = xfs_droplink(tp, ip); | |
1315 | if (error) | |
1316 | goto out_bmap_cancel; | |
1317 | ||
1318 | /* | |
1319 | * Determine if this is the last link while | |
1da177e4 LT |
1320 | * we are in the transaction. |
1321 | */ | |
8f112e3b | 1322 | link_zero = (ip->i_d.di_nlink == 0); |
1da177e4 | 1323 | |
1da177e4 LT |
1324 | /* |
1325 | * If this is a synchronous mount, make sure that the | |
1326 | * remove transaction goes to disk before returning to | |
1327 | * the user. | |
1328 | */ | |
8f112e3b | 1329 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 1330 | xfs_trans_set_sync(tp); |
1da177e4 | 1331 | |
f7c99b6f | 1332 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
8f112e3b CH |
1333 | if (error) |
1334 | goto out_bmap_cancel; | |
1da177e4 | 1335 | |
1c72bf90 | 1336 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
5df78e73 | 1337 | if (error) |
1da177e4 | 1338 | goto std_return; |
1da177e4 | 1339 | |
2a82b8be DC |
1340 | /* |
1341 | * If we are using filestreams, kill the stream association. | |
1342 | * If the file is still open it may get a new one but that | |
1343 | * will get killed on last close in xfs_close() so we don't | |
1344 | * have to worry about that. | |
1345 | */ | |
8f112e3b | 1346 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
2a82b8be DC |
1347 | xfs_filestream_deassociate(ip); |
1348 | ||
288699fe | 1349 | return 0; |
1da177e4 | 1350 | |
8f112e3b | 1351 | out_bmap_cancel: |
1da177e4 LT |
1352 | xfs_bmap_cancel(&free_list); |
1353 | cancel_flags |= XFS_TRANS_ABORT; | |
8f112e3b | 1354 | out_trans_cancel: |
1da177e4 | 1355 | xfs_trans_cancel(tp, cancel_flags); |
288699fe CH |
1356 | std_return: |
1357 | return error; | |
1da177e4 LT |
1358 | } |
1359 | ||
993386c1 | 1360 | int |
1da177e4 | 1361 | xfs_link( |
993386c1 | 1362 | xfs_inode_t *tdp, |
a3da7896 | 1363 | xfs_inode_t *sip, |
556b8b16 | 1364 | struct xfs_name *target_name) |
1da177e4 | 1365 | { |
993386c1 | 1366 | xfs_mount_t *mp = tdp->i_mount; |
1da177e4 | 1367 | xfs_trans_t *tp; |
1da177e4 LT |
1368 | int error; |
1369 | xfs_bmap_free_t free_list; | |
1370 | xfs_fsblock_t first_block; | |
1371 | int cancel_flags; | |
1372 | int committed; | |
1da177e4 | 1373 | int resblks; |
1da177e4 | 1374 | |
cca28fb8 | 1375 | trace_xfs_link(tdp, target_name); |
1da177e4 | 1376 | |
a3da7896 | 1377 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
1da177e4 | 1378 | |
1da177e4 LT |
1379 | if (XFS_FORCED_SHUTDOWN(mp)) |
1380 | return XFS_ERROR(EIO); | |
1381 | ||
7d095257 | 1382 | error = xfs_qm_dqattach(sip, 0); |
cb3f35bb CH |
1383 | if (error) |
1384 | goto std_return; | |
1385 | ||
7d095257 | 1386 | error = xfs_qm_dqattach(tdp, 0); |
1da177e4 LT |
1387 | if (error) |
1388 | goto std_return; | |
1389 | ||
1390 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); | |
1391 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 1392 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
1da177e4 LT |
1393 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
1394 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
1395 | if (error == ENOSPC) { | |
1396 | resblks = 0; | |
1397 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, | |
1398 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
1399 | } | |
1400 | if (error) { | |
1401 | cancel_flags = 0; | |
1402 | goto error_return; | |
1403 | } | |
1404 | ||
e1cccd91 | 1405 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
1da177e4 | 1406 | |
898621d5 CH |
1407 | xfs_trans_ijoin_ref(tp, sip, XFS_ILOCK_EXCL); |
1408 | xfs_trans_ijoin_ref(tp, tdp, XFS_ILOCK_EXCL); | |
1da177e4 LT |
1409 | |
1410 | /* | |
1411 | * If the source has too many links, we can't make any more to it. | |
1412 | */ | |
1413 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { | |
1414 | error = XFS_ERROR(EMLINK); | |
1415 | goto error_return; | |
1416 | } | |
1417 | ||
365ca83d NS |
1418 | /* |
1419 | * If we are using project inheritance, we only allow hard link | |
1420 | * creation in our tree when the project IDs are the same; else | |
1421 | * the tree quota mechanism could be circumvented. | |
1422 | */ | |
1423 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
6743099c | 1424 | (xfs_get_projid(tdp) != xfs_get_projid(sip)))) { |
b1ecdda9 | 1425 | error = XFS_ERROR(EXDEV); |
365ca83d NS |
1426 | goto error_return; |
1427 | } | |
1428 | ||
556b8b16 BN |
1429 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
1430 | if (error) | |
1da177e4 LT |
1431 | goto error_return; |
1432 | ||
9d87c319 | 1433 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 | 1434 | |
556b8b16 BN |
1435 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
1436 | &first_block, &free_list, resblks); | |
1da177e4 LT |
1437 | if (error) |
1438 | goto abort_return; | |
dcd79a14 | 1439 | xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
1440 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
1441 | ||
1442 | error = xfs_bumplink(tp, sip); | |
b71d300c | 1443 | if (error) |
1da177e4 | 1444 | goto abort_return; |
1da177e4 LT |
1445 | |
1446 | /* | |
1447 | * If this is a synchronous mount, make sure that the | |
1448 | * link transaction goes to disk before returning to | |
1449 | * the user. | |
1450 | */ | |
1451 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
1452 | xfs_trans_set_sync(tp); | |
1453 | } | |
1454 | ||
f7c99b6f | 1455 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
1456 | if (error) { |
1457 | xfs_bmap_cancel(&free_list); | |
1458 | goto abort_return; | |
1459 | } | |
1460 | ||
288699fe | 1461 | return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1462 | |
1463 | abort_return: | |
1464 | cancel_flags |= XFS_TRANS_ABORT; | |
1da177e4 LT |
1465 | error_return: |
1466 | xfs_trans_cancel(tp, cancel_flags); | |
288699fe CH |
1467 | std_return: |
1468 | return error; | |
1da177e4 | 1469 | } |
b71d300c | 1470 | |
993386c1 | 1471 | int |
1da177e4 | 1472 | xfs_symlink( |
993386c1 | 1473 | xfs_inode_t *dp, |
556b8b16 BN |
1474 | struct xfs_name *link_name, |
1475 | const char *target_path, | |
3e5daf05 | 1476 | mode_t mode, |
6c77b0ea | 1477 | xfs_inode_t **ipp) |
1da177e4 | 1478 | { |
993386c1 | 1479 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1480 | xfs_trans_t *tp; |
1da177e4 LT |
1481 | xfs_inode_t *ip; |
1482 | int error; | |
1483 | int pathlen; | |
1484 | xfs_bmap_free_t free_list; | |
1485 | xfs_fsblock_t first_block; | |
993386c1 | 1486 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1487 | uint cancel_flags; |
1488 | int committed; | |
1489 | xfs_fileoff_t first_fsb; | |
1490 | xfs_filblks_t fs_blocks; | |
1491 | int nmaps; | |
1492 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
1493 | xfs_daddr_t d; | |
556b8b16 | 1494 | const char *cur_chunk; |
1da177e4 LT |
1495 | int byte_cnt; |
1496 | int n; | |
1497 | xfs_buf_t *bp; | |
6743099c | 1498 | prid_t prid; |
1da177e4 LT |
1499 | struct xfs_dquot *udqp, *gdqp; |
1500 | uint resblks; | |
1da177e4 | 1501 | |
3937be5b | 1502 | *ipp = NULL; |
1da177e4 LT |
1503 | error = 0; |
1504 | ip = NULL; | |
1505 | tp = NULL; | |
1506 | ||
cca28fb8 | 1507 | trace_xfs_symlink(dp, link_name); |
1da177e4 LT |
1508 | |
1509 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1510 | return XFS_ERROR(EIO); | |
1511 | ||
1da177e4 LT |
1512 | /* |
1513 | * Check component lengths of the target path name. | |
1514 | */ | |
1515 | pathlen = strlen(target_path); | |
1516 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
1517 | return XFS_ERROR(ENAMETOOLONG); | |
1da177e4 | 1518 | |
1da177e4 | 1519 | udqp = gdqp = NULL; |
365ca83d | 1520 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
6743099c | 1521 | prid = xfs_get_projid(dp); |
1da177e4 | 1522 | else |
6743099c | 1523 | prid = XFS_PROJID_DEFAULT; |
1da177e4 LT |
1524 | |
1525 | /* | |
1526 | * Make sure that we have allocated dquot(s) on disk. | |
1527 | */ | |
7d095257 | 1528 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
1da177e4 LT |
1529 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1530 | if (error) | |
1531 | goto std_return; | |
1532 | ||
1533 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
1534 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
1535 | /* | |
1536 | * The symlink will fit into the inode data fork? | |
1537 | * There can't be any attributes so we get the whole variable part. | |
1538 | */ | |
1539 | if (pathlen <= XFS_LITINO(mp)) | |
1540 | fs_blocks = 0; | |
1541 | else | |
1542 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); | |
556b8b16 | 1543 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
1da177e4 LT |
1544 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
1545 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
1546 | if (error == ENOSPC && fs_blocks == 0) { | |
1547 | resblks = 0; | |
1548 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, | |
1549 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
1550 | } | |
1551 | if (error) { | |
1552 | cancel_flags = 0; | |
1da177e4 LT |
1553 | goto error_return; |
1554 | } | |
1555 | ||
f7c66ce3 | 1556 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 1557 | unlock_dp_on_error = B_TRUE; |
1da177e4 LT |
1558 | |
1559 | /* | |
1560 | * Check whether the directory allows new symlinks or not. | |
1561 | */ | |
1562 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
1563 | error = XFS_ERROR(EPERM); | |
1564 | goto error_return; | |
1565 | } | |
1566 | ||
1567 | /* | |
1568 | * Reserve disk quota : blocks and inode. | |
1569 | */ | |
7d095257 | 1570 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 LT |
1571 | if (error) |
1572 | goto error_return; | |
1573 | ||
1574 | /* | |
1575 | * Check for ability to enter directory entry, if no space reserved. | |
1576 | */ | |
556b8b16 BN |
1577 | error = xfs_dir_canenter(tp, dp, link_name, resblks); |
1578 | if (error) | |
1da177e4 LT |
1579 | goto error_return; |
1580 | /* | |
1581 | * Initialize the bmap freelist prior to calling either | |
1582 | * bmapi or the directory create code. | |
1583 | */ | |
9d87c319 | 1584 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
1585 | |
1586 | /* | |
1587 | * Allocate an inode for the symlink. | |
1588 | */ | |
6c77b0ea CH |
1589 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, |
1590 | prid, resblks > 0, &ip, NULL); | |
1da177e4 LT |
1591 | if (error) { |
1592 | if (error == ENOSPC) | |
1593 | goto error_return; | |
1594 | goto error1; | |
1595 | } | |
1da177e4 | 1596 | |
993386c1 CH |
1597 | /* |
1598 | * An error after we've joined dp to the transaction will result in the | |
1599 | * transaction cancel unlocking dp so don't do it explicitly in the | |
1600 | * error path. | |
1601 | */ | |
898621d5 | 1602 | xfs_trans_ijoin_ref(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 1603 | unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1604 | |
1605 | /* | |
1606 | * Also attach the dquot(s) to it, if applicable. | |
1607 | */ | |
7d095257 | 1608 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 LT |
1609 | |
1610 | if (resblks) | |
1611 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
1612 | /* | |
1613 | * If the symlink will fit into the inode, write it inline. | |
1614 | */ | |
1615 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
1616 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
1617 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
1618 | ip->i_d.di_size = pathlen; | |
1619 | ||
1620 | /* | |
1621 | * The inode was initially created in extent format. | |
1622 | */ | |
1623 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
1624 | ip->i_df.if_flags |= XFS_IFINLINE; | |
1625 | ||
1626 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
1627 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
1628 | ||
1629 | } else { | |
1630 | first_fsb = 0; | |
1631 | nmaps = SYMLINK_MAPS; | |
1632 | ||
1633 | error = xfs_bmapi(tp, ip, first_fsb, fs_blocks, | |
1634 | XFS_BMAPI_WRITE | XFS_BMAPI_METADATA, | |
1635 | &first_block, resblks, mval, &nmaps, | |
b4e9181e | 1636 | &free_list); |
ec3ba85f CH |
1637 | if (error) |
1638 | goto error2; | |
1da177e4 LT |
1639 | |
1640 | if (resblks) | |
1641 | resblks -= fs_blocks; | |
1642 | ip->i_d.di_size = pathlen; | |
1643 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1644 | ||
1645 | cur_chunk = target_path; | |
1646 | for (n = 0; n < nmaps; n++) { | |
1647 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
1648 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
1649 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
1650 | BTOBB(byte_cnt), 0); | |
5a52c2a5 | 1651 | ASSERT(!xfs_buf_geterror(bp)); |
1da177e4 LT |
1652 | if (pathlen < byte_cnt) { |
1653 | byte_cnt = pathlen; | |
1654 | } | |
1655 | pathlen -= byte_cnt; | |
1656 | ||
62926044 | 1657 | memcpy(bp->b_addr, cur_chunk, byte_cnt); |
1da177e4 LT |
1658 | cur_chunk += byte_cnt; |
1659 | ||
1660 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); | |
1661 | } | |
1662 | } | |
1663 | ||
1664 | /* | |
1665 | * Create the directory entry for the symlink. | |
1666 | */ | |
556b8b16 BN |
1667 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, |
1668 | &first_block, &free_list, resblks); | |
f6c2d1fa | 1669 | if (error) |
ec3ba85f | 1670 | goto error2; |
dcd79a14 | 1671 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
1672 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
1673 | ||
1da177e4 LT |
1674 | /* |
1675 | * If this is a synchronous mount, make sure that the | |
1676 | * symlink transaction goes to disk before returning to | |
1677 | * the user. | |
1678 | */ | |
1679 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
1680 | xfs_trans_set_sync(tp); | |
1681 | } | |
1682 | ||
f7c99b6f | 1683 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1684 | if (error) { |
1685 | goto error2; | |
1686 | } | |
1c72bf90 | 1687 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
7d095257 CH |
1688 | xfs_qm_dqrele(udqp); |
1689 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1690 | |
288699fe CH |
1691 | *ipp = ip; |
1692 | return 0; | |
1da177e4 LT |
1693 | |
1694 | error2: | |
1695 | IRELE(ip); | |
1696 | error1: | |
1697 | xfs_bmap_cancel(&free_list); | |
1698 | cancel_flags |= XFS_TRANS_ABORT; | |
1699 | error_return: | |
1700 | xfs_trans_cancel(tp, cancel_flags); | |
7d095257 CH |
1701 | xfs_qm_dqrele(udqp); |
1702 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1703 | |
993386c1 | 1704 | if (unlock_dp_on_error) |
1da177e4 | 1705 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
288699fe CH |
1706 | std_return: |
1707 | return error; | |
1da177e4 LT |
1708 | } |
1709 | ||
1da177e4 | 1710 | int |
993386c1 CH |
1711 | xfs_set_dmattrs( |
1712 | xfs_inode_t *ip, | |
1da177e4 | 1713 | u_int evmask, |
993386c1 | 1714 | u_int16_t state) |
1da177e4 | 1715 | { |
993386c1 | 1716 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 1717 | xfs_trans_t *tp; |
1da177e4 LT |
1718 | int error; |
1719 | ||
1720 | if (!capable(CAP_SYS_ADMIN)) | |
1721 | return XFS_ERROR(EPERM); | |
1722 | ||
1da177e4 LT |
1723 | if (XFS_FORCED_SHUTDOWN(mp)) |
1724 | return XFS_ERROR(EIO); | |
1725 | ||
1726 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
1727 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
1728 | if (error) { | |
1729 | xfs_trans_cancel(tp, 0); | |
1730 | return error; | |
1731 | } | |
1732 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
898621d5 | 1733 | xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL); |
1da177e4 | 1734 | |
613d7043 CH |
1735 | ip->i_d.di_dmevmask = evmask; |
1736 | ip->i_d.di_dmstate = state; | |
1da177e4 LT |
1737 | |
1738 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1c72bf90 | 1739 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
1740 | |
1741 | return error; | |
1742 | } | |
1743 | ||
1da177e4 LT |
1744 | /* |
1745 | * xfs_alloc_file_space() | |
1746 | * This routine allocates disk space for the given file. | |
1747 | * | |
1748 | * If alloc_type == 0, this request is for an ALLOCSP type | |
1749 | * request which will change the file size. In this case, no | |
1750 | * DMAPI event will be generated by the call. A TRUNCATE event | |
1751 | * will be generated later by xfs_setattr. | |
1752 | * | |
1753 | * If alloc_type != 0, this request is for a RESVSP type | |
1754 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the | |
1755 | * lower block boundary byte address is less than the file's | |
1756 | * length. | |
1757 | * | |
1758 | * RETURNS: | |
1759 | * 0 on success | |
1760 | * errno on error | |
1761 | * | |
1762 | */ | |
ba0f32d4 | 1763 | STATIC int |
1da177e4 LT |
1764 | xfs_alloc_file_space( |
1765 | xfs_inode_t *ip, | |
1766 | xfs_off_t offset, | |
1767 | xfs_off_t len, | |
1768 | int alloc_type, | |
1769 | int attr_flags) | |
1770 | { | |
dd9f438e NS |
1771 | xfs_mount_t *mp = ip->i_mount; |
1772 | xfs_off_t count; | |
1da177e4 LT |
1773 | xfs_filblks_t allocated_fsb; |
1774 | xfs_filblks_t allocatesize_fsb; | |
dd9f438e NS |
1775 | xfs_extlen_t extsz, temp; |
1776 | xfs_fileoff_t startoffset_fsb; | |
1da177e4 | 1777 | xfs_fsblock_t firstfsb; |
dd9f438e NS |
1778 | int nimaps; |
1779 | int bmapi_flag; | |
1780 | int quota_flag; | |
1da177e4 | 1781 | int rt; |
1da177e4 | 1782 | xfs_trans_t *tp; |
dd9f438e NS |
1783 | xfs_bmbt_irec_t imaps[1], *imapp; |
1784 | xfs_bmap_free_t free_list; | |
1785 | uint qblocks, resblks, resrtextents; | |
1786 | int committed; | |
1787 | int error; | |
1da177e4 | 1788 | |
cca28fb8 | 1789 | trace_xfs_alloc_file_space(ip); |
1da177e4 LT |
1790 | |
1791 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1792 | return XFS_ERROR(EIO); | |
1793 | ||
7d095257 CH |
1794 | error = xfs_qm_dqattach(ip, 0); |
1795 | if (error) | |
1da177e4 LT |
1796 | return error; |
1797 | ||
1798 | if (len <= 0) | |
1799 | return XFS_ERROR(EINVAL); | |
1800 | ||
957d0ebe DC |
1801 | rt = XFS_IS_REALTIME_INODE(ip); |
1802 | extsz = xfs_get_extsz_hint(ip); | |
1803 | ||
1da177e4 | 1804 | count = len; |
1da177e4 | 1805 | imapp = &imaps[0]; |
dd9f438e | 1806 | nimaps = 1; |
44722352 | 1807 | bmapi_flag = XFS_BMAPI_WRITE | alloc_type; |
1da177e4 LT |
1808 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
1809 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); | |
1810 | ||
1da177e4 | 1811 | /* |
dd9f438e | 1812 | * Allocate file space until done or until there is an error |
1da177e4 | 1813 | */ |
1da177e4 | 1814 | while (allocatesize_fsb && !error) { |
dd9f438e NS |
1815 | xfs_fileoff_t s, e; |
1816 | ||
1da177e4 | 1817 | /* |
3ddb8fa9 | 1818 | * Determine space reservations for data/realtime. |
1da177e4 | 1819 | */ |
dd9f438e | 1820 | if (unlikely(extsz)) { |
1da177e4 | 1821 | s = startoffset_fsb; |
dd9f438e NS |
1822 | do_div(s, extsz); |
1823 | s *= extsz; | |
1824 | e = startoffset_fsb + allocatesize_fsb; | |
1825 | if ((temp = do_mod(startoffset_fsb, extsz))) | |
1826 | e += temp; | |
1827 | if ((temp = do_mod(e, extsz))) | |
1828 | e += extsz - temp; | |
1829 | } else { | |
1830 | s = 0; | |
1831 | e = allocatesize_fsb; | |
1832 | } | |
1833 | ||
72656c46 DC |
1834 | /* |
1835 | * The transaction reservation is limited to a 32-bit block | |
1836 | * count, hence we need to limit the number of blocks we are | |
1837 | * trying to reserve to avoid an overflow. We can't allocate | |
1838 | * more than @nimaps extents, and an extent is limited on disk | |
1839 | * to MAXEXTLEN (21 bits), so use that to enforce the limit. | |
1840 | */ | |
1841 | resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps)); | |
dd9f438e | 1842 | if (unlikely(rt)) { |
72656c46 | 1843 | resrtextents = qblocks = resblks; |
dd9f438e NS |
1844 | resrtextents /= mp->m_sb.sb_rextsize; |
1845 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
1846 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
1da177e4 | 1847 | } else { |
dd9f438e | 1848 | resrtextents = 0; |
72656c46 | 1849 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks); |
dd9f438e | 1850 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
1da177e4 LT |
1851 | } |
1852 | ||
1853 | /* | |
dd9f438e | 1854 | * Allocate and setup the transaction. |
1da177e4 LT |
1855 | */ |
1856 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
dd9f438e NS |
1857 | error = xfs_trans_reserve(tp, resblks, |
1858 | XFS_WRITE_LOG_RES(mp), resrtextents, | |
1da177e4 LT |
1859 | XFS_TRANS_PERM_LOG_RES, |
1860 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 1861 | /* |
dd9f438e | 1862 | * Check for running out of space |
1da177e4 LT |
1863 | */ |
1864 | if (error) { | |
1865 | /* | |
1866 | * Free the transaction structure. | |
1867 | */ | |
1868 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
1869 | xfs_trans_cancel(tp, 0); | |
1870 | break; | |
1871 | } | |
1872 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
1873 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, |
1874 | 0, quota_flag); | |
1da177e4 LT |
1875 | if (error) |
1876 | goto error1; | |
1877 | ||
898621d5 | 1878 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
1879 | |
1880 | /* | |
dd9f438e | 1881 | * Issue the xfs_bmapi() call to allocate the blocks |
1da177e4 | 1882 | */ |
9d87c319 | 1883 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 1884 | error = xfs_bmapi(tp, ip, startoffset_fsb, |
dd9f438e NS |
1885 | allocatesize_fsb, bmapi_flag, |
1886 | &firstfsb, 0, imapp, &nimaps, | |
b4e9181e | 1887 | &free_list); |
1da177e4 LT |
1888 | if (error) { |
1889 | goto error0; | |
1890 | } | |
1891 | ||
1892 | /* | |
dd9f438e | 1893 | * Complete the transaction |
1da177e4 | 1894 | */ |
f7c99b6f | 1895 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1896 | if (error) { |
1897 | goto error0; | |
1898 | } | |
1899 | ||
1c72bf90 | 1900 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1901 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1902 | if (error) { | |
1903 | break; | |
1904 | } | |
1905 | ||
1906 | allocated_fsb = imapp->br_blockcount; | |
1907 | ||
dd9f438e | 1908 | if (nimaps == 0) { |
1da177e4 LT |
1909 | error = XFS_ERROR(ENOSPC); |
1910 | break; | |
1911 | } | |
1912 | ||
1913 | startoffset_fsb += allocated_fsb; | |
1914 | allocatesize_fsb -= allocated_fsb; | |
1915 | } | |
1da177e4 LT |
1916 | |
1917 | return error; | |
1918 | ||
dd9f438e | 1919 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 1920 | xfs_bmap_cancel(&free_list); |
7d095257 | 1921 | xfs_trans_unreserve_quota_nblks(tp, ip, qblocks, 0, quota_flag); |
dd9f438e NS |
1922 | |
1923 | error1: /* Just cancel transaction */ | |
1da177e4 LT |
1924 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
1925 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
288699fe | 1926 | return error; |
1da177e4 LT |
1927 | } |
1928 | ||
1929 | /* | |
1930 | * Zero file bytes between startoff and endoff inclusive. | |
1931 | * The iolock is held exclusive and no blocks are buffered. | |
2fd6f6ec LM |
1932 | * |
1933 | * This function is used by xfs_free_file_space() to zero | |
1934 | * partial blocks when the range to free is not block aligned. | |
1935 | * When unreserving space with boundaries that are not block | |
1936 | * aligned we round up the start and round down the end | |
1937 | * boundaries and then use this function to zero the parts of | |
1938 | * the blocks that got dropped during the rounding. | |
1da177e4 LT |
1939 | */ |
1940 | STATIC int | |
1941 | xfs_zero_remaining_bytes( | |
1942 | xfs_inode_t *ip, | |
1943 | xfs_off_t startoff, | |
1944 | xfs_off_t endoff) | |
1945 | { | |
1946 | xfs_bmbt_irec_t imap; | |
1947 | xfs_fileoff_t offset_fsb; | |
1948 | xfs_off_t lastoffset; | |
1949 | xfs_off_t offset; | |
1950 | xfs_buf_t *bp; | |
1951 | xfs_mount_t *mp = ip->i_mount; | |
1952 | int nimap; | |
1953 | int error = 0; | |
1954 | ||
2fd6f6ec LM |
1955 | /* |
1956 | * Avoid doing I/O beyond eof - it's not necessary | |
1957 | * since nothing can read beyond eof. The space will | |
1958 | * be zeroed when the file is extended anyway. | |
1959 | */ | |
1960 | if (startoff >= ip->i_size) | |
1961 | return 0; | |
1962 | ||
1963 | if (endoff > ip->i_size) | |
1964 | endoff = ip->i_size; | |
1965 | ||
686865f7 DC |
1966 | bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ? |
1967 | mp->m_rtdev_targp : mp->m_ddev_targp, | |
1968 | mp->m_sb.sb_blocksize, XBF_DONT_BLOCK); | |
c6422617 LM |
1969 | if (!bp) |
1970 | return XFS_ERROR(ENOMEM); | |
1da177e4 | 1971 | |
c8da0faf CH |
1972 | xfs_buf_unlock(bp); |
1973 | ||
1da177e4 LT |
1974 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { |
1975 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
1976 | nimap = 1; | |
541d7d3c | 1977 | error = xfs_bmapi(NULL, ip, offset_fsb, 1, 0, |
b4e9181e | 1978 | NULL, 0, &imap, &nimap, NULL); |
1da177e4 LT |
1979 | if (error || nimap < 1) |
1980 | break; | |
1981 | ASSERT(imap.br_blockcount >= 1); | |
1982 | ASSERT(imap.br_startoff == offset_fsb); | |
1983 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; | |
1984 | if (lastoffset > endoff) | |
1985 | lastoffset = endoff; | |
1986 | if (imap.br_startblock == HOLESTARTBLOCK) | |
1987 | continue; | |
1988 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
1989 | if (imap.br_state == XFS_EXT_UNWRITTEN) | |
1990 | continue; | |
1991 | XFS_BUF_UNDONE(bp); | |
1992 | XFS_BUF_UNWRITE(bp); | |
1993 | XFS_BUF_READ(bp); | |
9d87c319 | 1994 | XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock)); |
1da177e4 | 1995 | xfsbdstrat(mp, bp); |
1a1a3e97 | 1996 | error = xfs_buf_iowait(bp); |
d64e31a2 | 1997 | if (error) { |
1da177e4 LT |
1998 | xfs_ioerror_alert("xfs_zero_remaining_bytes(read)", |
1999 | mp, bp, XFS_BUF_ADDR(bp)); | |
2000 | break; | |
2001 | } | |
62926044 | 2002 | memset(bp->b_addr + |
1da177e4 LT |
2003 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), |
2004 | 0, lastoffset - offset + 1); | |
2005 | XFS_BUF_UNDONE(bp); | |
2006 | XFS_BUF_UNREAD(bp); | |
2007 | XFS_BUF_WRITE(bp); | |
2008 | xfsbdstrat(mp, bp); | |
1a1a3e97 | 2009 | error = xfs_buf_iowait(bp); |
d64e31a2 | 2010 | if (error) { |
1da177e4 LT |
2011 | xfs_ioerror_alert("xfs_zero_remaining_bytes(write)", |
2012 | mp, bp, XFS_BUF_ADDR(bp)); | |
2013 | break; | |
2014 | } | |
2015 | } | |
2016 | xfs_buf_free(bp); | |
2017 | return error; | |
2018 | } | |
2019 | ||
2020 | /* | |
2021 | * xfs_free_file_space() | |
2022 | * This routine frees disk space for the given file. | |
2023 | * | |
2024 | * This routine is only called by xfs_change_file_space | |
2025 | * for an UNRESVSP type call. | |
2026 | * | |
2027 | * RETURNS: | |
2028 | * 0 on success | |
2029 | * errno on error | |
2030 | * | |
2031 | */ | |
2032 | STATIC int | |
2033 | xfs_free_file_space( | |
2034 | xfs_inode_t *ip, | |
2035 | xfs_off_t offset, | |
2036 | xfs_off_t len, | |
2037 | int attr_flags) | |
2038 | { | |
2039 | int committed; | |
2040 | int done; | |
1da177e4 LT |
2041 | xfs_fileoff_t endoffset_fsb; |
2042 | int error; | |
2043 | xfs_fsblock_t firstfsb; | |
2044 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
2045 | xfs_bmbt_irec_t imap; |
2046 | xfs_off_t ioffset; | |
2047 | xfs_extlen_t mod=0; | |
2048 | xfs_mount_t *mp; | |
2049 | int nimap; | |
2050 | uint resblks; | |
673cdf5c | 2051 | uint rounding; |
1da177e4 LT |
2052 | int rt; |
2053 | xfs_fileoff_t startoffset_fsb; | |
2054 | xfs_trans_t *tp; | |
5fcbab35 | 2055 | int need_iolock = 1; |
1da177e4 | 2056 | |
1da177e4 LT |
2057 | mp = ip->i_mount; |
2058 | ||
cca28fb8 | 2059 | trace_xfs_free_file_space(ip); |
bd5a876a | 2060 | |
7d095257 CH |
2061 | error = xfs_qm_dqattach(ip, 0); |
2062 | if (error) | |
1da177e4 LT |
2063 | return error; |
2064 | ||
2065 | error = 0; | |
2066 | if (len <= 0) /* if nothing being freed */ | |
2067 | return error; | |
71ddabb9 | 2068 | rt = XFS_IS_REALTIME_INODE(ip); |
1da177e4 | 2069 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
288699fe | 2070 | endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); |
1da177e4 | 2071 | |
0f285c8a | 2072 | if (attr_flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 2073 | need_iolock = 0; |
9fa8046f | 2074 | if (need_iolock) { |
1da177e4 | 2075 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
25e41b3d CH |
2076 | /* wait for the completion of any pending DIOs */ |
2077 | xfs_ioend_wait(ip); | |
9fa8046f | 2078 | } |
5fcbab35 | 2079 | |
e6a4b37f | 2080 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
1da177e4 | 2081 | ioffset = offset & ~(rounding - 1); |
bd5a876a | 2082 | |
df80c933 | 2083 | if (VN_CACHED(VFS_I(ip)) != 0) { |
e6a4b37f | 2084 | error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); |
d3cf2094 LM |
2085 | if (error) |
2086 | goto out_unlock_iolock; | |
bd5a876a CH |
2087 | } |
2088 | ||
1da177e4 LT |
2089 | /* |
2090 | * Need to zero the stuff we're not freeing, on disk. | |
9da096fd | 2091 | * If it's a realtime file & can't use unwritten extents then we |
1da177e4 LT |
2092 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
2093 | * will take care of it for us. | |
2094 | */ | |
62118709 | 2095 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 | 2096 | nimap = 1; |
541d7d3c | 2097 | error = xfs_bmapi(NULL, ip, startoffset_fsb, |
b4e9181e | 2098 | 1, 0, NULL, 0, &imap, &nimap, NULL); |
1da177e4 LT |
2099 | if (error) |
2100 | goto out_unlock_iolock; | |
2101 | ASSERT(nimap == 0 || nimap == 1); | |
2102 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2103 | xfs_daddr_t block; | |
2104 | ||
2105 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2106 | block = imap.br_startblock; | |
2107 | mod = do_div(block, mp->m_sb.sb_rextsize); | |
2108 | if (mod) | |
2109 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; | |
2110 | } | |
2111 | nimap = 1; | |
541d7d3c | 2112 | error = xfs_bmapi(NULL, ip, endoffset_fsb - 1, |
b4e9181e | 2113 | 1, 0, NULL, 0, &imap, &nimap, NULL); |
1da177e4 LT |
2114 | if (error) |
2115 | goto out_unlock_iolock; | |
2116 | ASSERT(nimap == 0 || nimap == 1); | |
2117 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2118 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2119 | mod++; | |
2120 | if (mod && (mod != mp->m_sb.sb_rextsize)) | |
2121 | endoffset_fsb -= mod; | |
2122 | } | |
2123 | } | |
2124 | if ((done = (endoffset_fsb <= startoffset_fsb))) | |
2125 | /* | |
2126 | * One contiguous piece to clear | |
2127 | */ | |
2128 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); | |
2129 | else { | |
2130 | /* | |
2131 | * Some full blocks, possibly two pieces to clear | |
2132 | */ | |
2133 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) | |
2134 | error = xfs_zero_remaining_bytes(ip, offset, | |
2135 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); | |
2136 | if (!error && | |
2137 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) | |
2138 | error = xfs_zero_remaining_bytes(ip, | |
2139 | XFS_FSB_TO_B(mp, endoffset_fsb), | |
2140 | offset + len - 1); | |
2141 | } | |
2142 | ||
2143 | /* | |
2144 | * free file space until done or until there is an error | |
2145 | */ | |
2146 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
2147 | while (!error && !done) { | |
2148 | ||
2149 | /* | |
91ebecc7 DC |
2150 | * allocate and setup the transaction. Allow this |
2151 | * transaction to dip into the reserve blocks to ensure | |
2152 | * the freeing of the space succeeds at ENOSPC. | |
1da177e4 LT |
2153 | */ |
2154 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
91ebecc7 | 2155 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
2156 | error = xfs_trans_reserve(tp, |
2157 | resblks, | |
2158 | XFS_WRITE_LOG_RES(mp), | |
2159 | 0, | |
2160 | XFS_TRANS_PERM_LOG_RES, | |
2161 | XFS_WRITE_LOG_COUNT); | |
2162 | ||
2163 | /* | |
2164 | * check for running out of space | |
2165 | */ | |
2166 | if (error) { | |
2167 | /* | |
2168 | * Free the transaction structure. | |
2169 | */ | |
2170 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
2171 | xfs_trans_cancel(tp, 0); | |
2172 | break; | |
2173 | } | |
2174 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
2175 | error = xfs_trans_reserve_quota(tp, mp, |
2176 | ip->i_udquot, ip->i_gdquot, | |
2177 | resblks, 0, XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
2178 | if (error) |
2179 | goto error1; | |
2180 | ||
898621d5 | 2181 | xfs_trans_ijoin(tp, ip); |
1da177e4 LT |
2182 | |
2183 | /* | |
2184 | * issue the bunmapi() call to free the blocks | |
2185 | */ | |
9d87c319 | 2186 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 2187 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
1da177e4 | 2188 | endoffset_fsb - startoffset_fsb, |
b4e9181e | 2189 | 0, 2, &firstfsb, &free_list, &done); |
1da177e4 LT |
2190 | if (error) { |
2191 | goto error0; | |
2192 | } | |
2193 | ||
2194 | /* | |
2195 | * complete the transaction | |
2196 | */ | |
f7c99b6f | 2197 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2198 | if (error) { |
2199 | goto error0; | |
2200 | } | |
2201 | ||
1c72bf90 | 2202 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2203 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2204 | } | |
2205 | ||
2206 | out_unlock_iolock: | |
2207 | if (need_iolock) | |
2208 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
2209 | return error; | |
2210 | ||
2211 | error0: | |
2212 | xfs_bmap_cancel(&free_list); | |
2213 | error1: | |
2214 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
2215 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : | |
2216 | XFS_ILOCK_EXCL); | |
2217 | return error; | |
2218 | } | |
2219 | ||
2220 | /* | |
2221 | * xfs_change_file_space() | |
2222 | * This routine allocates or frees disk space for the given file. | |
2223 | * The user specified parameters are checked for alignment and size | |
2224 | * limitations. | |
2225 | * | |
2226 | * RETURNS: | |
2227 | * 0 on success | |
2228 | * errno on error | |
2229 | * | |
2230 | */ | |
2231 | int | |
2232 | xfs_change_file_space( | |
993386c1 | 2233 | xfs_inode_t *ip, |
1da177e4 LT |
2234 | int cmd, |
2235 | xfs_flock64_t *bf, | |
2236 | xfs_off_t offset, | |
1da177e4 LT |
2237 | int attr_flags) |
2238 | { | |
993386c1 | 2239 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
2240 | int clrprealloc; |
2241 | int error; | |
2242 | xfs_fsize_t fsize; | |
1da177e4 LT |
2243 | int setprealloc; |
2244 | xfs_off_t startoffset; | |
2245 | xfs_off_t llen; | |
2246 | xfs_trans_t *tp; | |
0f285c8a | 2247 | struct iattr iattr; |
44722352 | 2248 | int prealloc_type; |
1da177e4 | 2249 | |
993386c1 | 2250 | if (!S_ISREG(ip->i_d.di_mode)) |
1da177e4 LT |
2251 | return XFS_ERROR(EINVAL); |
2252 | ||
1da177e4 LT |
2253 | switch (bf->l_whence) { |
2254 | case 0: /*SEEK_SET*/ | |
2255 | break; | |
2256 | case 1: /*SEEK_CUR*/ | |
2257 | bf->l_start += offset; | |
2258 | break; | |
2259 | case 2: /*SEEK_END*/ | |
ba87ea69 | 2260 | bf->l_start += ip->i_size; |
1da177e4 LT |
2261 | break; |
2262 | default: | |
2263 | return XFS_ERROR(EINVAL); | |
2264 | } | |
2265 | ||
2266 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; | |
2267 | ||
2268 | if ( (bf->l_start < 0) | |
2269 | || (bf->l_start > XFS_MAXIOFFSET(mp)) | |
2270 | || (bf->l_start + llen < 0) | |
2271 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) | |
2272 | return XFS_ERROR(EINVAL); | |
2273 | ||
2274 | bf->l_whence = 0; | |
2275 | ||
2276 | startoffset = bf->l_start; | |
ba87ea69 | 2277 | fsize = ip->i_size; |
1da177e4 LT |
2278 | |
2279 | /* | |
2280 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve | |
2281 | * file space. | |
2282 | * These calls do NOT zero the data space allocated to the file, | |
2283 | * nor do they change the file size. | |
2284 | * | |
2285 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file | |
2286 | * space. | |
2287 | * These calls cause the new file data to be zeroed and the file | |
2288 | * size to be changed. | |
2289 | */ | |
2290 | setprealloc = clrprealloc = 0; | |
44722352 | 2291 | prealloc_type = XFS_BMAPI_PREALLOC; |
1da177e4 LT |
2292 | |
2293 | switch (cmd) { | |
44722352 DC |
2294 | case XFS_IOC_ZERO_RANGE: |
2295 | prealloc_type |= XFS_BMAPI_CONVERT; | |
2296 | xfs_tosspages(ip, startoffset, startoffset + bf->l_len, 0); | |
2297 | /* FALLTHRU */ | |
1da177e4 LT |
2298 | case XFS_IOC_RESVSP: |
2299 | case XFS_IOC_RESVSP64: | |
2300 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, | |
44722352 | 2301 | prealloc_type, attr_flags); |
1da177e4 LT |
2302 | if (error) |
2303 | return error; | |
2304 | setprealloc = 1; | |
2305 | break; | |
2306 | ||
2307 | case XFS_IOC_UNRESVSP: | |
2308 | case XFS_IOC_UNRESVSP64: | |
2309 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, | |
2310 | attr_flags))) | |
2311 | return error; | |
2312 | break; | |
2313 | ||
2314 | case XFS_IOC_ALLOCSP: | |
2315 | case XFS_IOC_ALLOCSP64: | |
2316 | case XFS_IOC_FREESP: | |
2317 | case XFS_IOC_FREESP64: | |
2318 | if (startoffset > fsize) { | |
2319 | error = xfs_alloc_file_space(ip, fsize, | |
2320 | startoffset - fsize, 0, attr_flags); | |
2321 | if (error) | |
2322 | break; | |
2323 | } | |
2324 | ||
0f285c8a CH |
2325 | iattr.ia_valid = ATTR_SIZE; |
2326 | iattr.ia_size = startoffset; | |
1da177e4 | 2327 | |
c4ed4243 | 2328 | error = xfs_setattr_size(ip, &iattr, attr_flags); |
1da177e4 LT |
2329 | |
2330 | if (error) | |
2331 | return error; | |
2332 | ||
2333 | clrprealloc = 1; | |
2334 | break; | |
2335 | ||
2336 | default: | |
2337 | ASSERT(0); | |
2338 | return XFS_ERROR(EINVAL); | |
2339 | } | |
2340 | ||
2341 | /* | |
2342 | * update the inode timestamp, mode, and prealloc flag bits | |
2343 | */ | |
2344 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
2345 | ||
2346 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), | |
2347 | 0, 0, 0))) { | |
2348 | /* ASSERT(0); */ | |
2349 | xfs_trans_cancel(tp, 0); | |
2350 | return error; | |
2351 | } | |
2352 | ||
2353 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2354 | ||
898621d5 | 2355 | xfs_trans_ijoin(tp, ip); |
1da177e4 | 2356 | |
0f285c8a | 2357 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
1da177e4 LT |
2358 | ip->i_d.di_mode &= ~S_ISUID; |
2359 | ||
2360 | /* | |
2361 | * Note that we don't have to worry about mandatory | |
2362 | * file locking being disabled here because we only | |
2363 | * clear the S_ISGID bit if the Group execute bit is | |
2364 | * on, but if it was on then mandatory locking wouldn't | |
2365 | * have been enabled. | |
2366 | */ | |
2367 | if (ip->i_d.di_mode & S_IXGRP) | |
2368 | ip->i_d.di_mode &= ~S_ISGID; | |
2369 | ||
dcd79a14 | 2370 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
1da177e4 LT |
2371 | } |
2372 | if (setprealloc) | |
2373 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; | |
2374 | else if (clrprealloc) | |
2375 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; | |
2376 | ||
2377 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
82878897 DC |
2378 | if (attr_flags & XFS_ATTR_SYNC) |
2379 | xfs_trans_set_sync(tp); | |
1da177e4 | 2380 | |
1c72bf90 | 2381 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
2382 | |
2383 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
2384 | ||
2385 | return error; | |
2386 | } |